Communication System, Transmitting Device, Receiving Device, and Communication Method

1. A communication system comprising: a transmitting device which compresses input data according to quality of service assigned to the input data and transmits the compressed data; and a receiving device which receives the compressed data transmitted from the transmitting device, decompresses the compressed data according to the quality of service assigned to the input data and outputs decompressed data, wherein the transmitting device determines, on the basis of the quality of service assigned to the input data, a compression algorithm used for compression of the input data and the transmitting device compresses the input data using the determined compression algorithm, the transmitting device adds compression information indicating that the input data is compressed to the compressed data, and transmits the compressed data to which the compression information is added.

2. The communication system according to claim 1 , wherein the transmitting device compresses the input data on the basis of transmission delay characteristics prescribed by the quality of service assigned to the input data.

3. The communication system according to claim 2 , wherein the quality of service is selected from UGS, rtPS, nrtPS, ertPS and BE, and the transmitting device compresses the data only when the data to which nrtPS or BE is assigned is input.

4. The communication system according to claim 1 , wherein the transmitting device preliminarily stores compression algorithm information indicating the compression algorithm used for compression of the data in relation to the quality of service, and determines the compression algorithm used for compression of the data on the basis of the compression algorithm information corresponding to the quality of service assigned to the input data.

5. The communication system according to claims 1 , wherein the transmitting device compresses the input data according to the quality of service assigned to the input data, determines priority in transmission of the compressed data according to the quality of service, and transmits the compressed data according to the determined priority.

6. The communication system according to claim 5 , wherein the transmitting device preliminarily stores priority information indicating the priority in transmission of the compressed data in relation to the quality of service, and determines the priority in transmission of the compressed data on the basis of the priority information corresponding to the quality of service.

7. The communication system according to claims 1 wherein the communication system is used for a backhaul network that connects a radio access network and a core network to each other.

8. The communication system according to claim 7 , wherein the transmitting device and the receiving device are opposed each other in a point-to-point fashion between the radio access network and the core network, and transmit and receive the data.

9. A transmitting device comprising: hardware; a compressor to compress input data according to quality of service assigned to the input data; and a transmitter to transmit the compressed data compressed by the compressor, wherein: one or more of the compressor and the transmitter are implemented via the hardware, the compressor is to determine, on the basis of the quality of service assigned to the input data a compression algorithm used for compression of the input data and the compressor is to compress the input data using the determined compression algorithm, the compressor is to add compression information indicating that the input data is compressed to the compressed data, and the transmitter is to transmit the compressed data to which the compression information is added.

10. The transmitting device according to claim 9 , wherein the compressor compresses the input data on the basis of transmission delay characteristics prescribed by the quality of service assigned to the input data.

11. The transmitting device according to claim 10 , wherein the quality of service is selected from UGS, rtPS, nrtPS, ertPS and BE, and the compressor compresses the data only when the data to which nrtPS or BE is assigned is input.

12. The transmitting device according to claim 9 , further comprising an algorithm storage unit storing compression algorithm information indicating the compression algorithm used for compression of the data in relation to the quality of service, wherein the compressor reads the compression algorithm information corresponding to the quality of service assigned to the input data from the algorithm storage, and determines the compression algorithm used for compression of the data on the basis of the read compression algorithm information.

13. The transmitting device according to claims 9 , wherein the transmitter determines priority in transmission of the data compressed by the compressor according to the quality of service assigned to the input data, and transmits the data compressed by the compressor according to the determined priority.

14. The transmitting device according to claim 13 , further comprising a priority storage unit storing priority information indicating the priority in transmission of the compressed data in relation to the quality of service, wherein the transmitter reads the priority information corresponding to the quality of service assigned to the input data from the priority storage unit, and determines the priority in transmission of the data compressed by the compressor on the basis of the priority information.

15. A communication method comprising: compressing input data according to quality of service assigned to the input data, including determining, on the basis of the quality of service assigned to the input data, a compression algorithm used for compression of the input data; adding compression information indicating that the input data is compressed to a compressed data; transferring the compressed data from a transmitting device to a receiving device, the compressed data transmitted including the compression information; decompressing the compressed data received by the receiving device according to the quality of service; and outputting the decompressed data.

16. A transmitting device comprising: compression means for compressing input data according to quality of service assigned to the input data; and transmission means for transmitting the input data compressed by the compression means, wherein: the compression means is further for determining, on the basis of the quality of service assigned to the input data, a compression algorithm used for compression of the input data and the compression means is further for compressing the input data using the determined compression algorithm, the compression means is further for adding compression information indicating that the input data is compressed to a compressed data, and the transmission means is further for transmitting the compressed data to which the compression information is added.